981
FNCA52 TJSJ 270844
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
444 AM AST SAT DEC 27 2025
DISCUSSION
DRYING CONDITIONS CONTINUE TO DEVELOP, ESPECIALLY ACROSS SOUTHERN
PUERTO RICO, WHERE LOCALIZED ABNORMALLY DRY CONDITIONS PERSIST. MONTHLY
RAINFALL HAS BEEN MINIMAL, AND 30- TO 60-DAY RAINFALL DEFICITS
CONTINUE, SUPPORTING THE ONGOING DRYING OF FINE FUELS.
THERE IS NO ELEVATED FIRE DANGER TODAY. WHILE THERE IS SOME
UNCERTAINTY IN DROUGHT AND SOIL MOISTURE INDICES, KBDI VALUES HAVE
INCREASED TO AROUND 540 AT CABO ROJO AND 503 AT CAMP SANTIAGO,
INDICATING INCREASING FUEL DRYNESS, THOUGH STILL BELOW THRESHOLDS
FOR FIRE WEATHER STATEMENT OR RED FLAG WARNING. LOW RELATIVE
HUMIDITY AT TIMES, COMBINED WITH OCCASIONAL WIND GUSTS OF 20–25
MPH TYPICAL OF WINTER TRADE-WIND PATTERNS, HAS BRIEFLY ENHANCED
FIRE SPREAD POTENTIAL, WITH A FEW SMALL WILDFIRES OBSERVED.
OVERALL, FIRE DANGER REMAINS LOW AT PRESENT, BUT CONTINUED DRYING
OVER THE NEXT SEVERAL DAYS TO WEEKS COULD ELEVATE FIRE RISK,
WARRANTING CLOSE MONITORING, PARTICULARLY ACROSS SOUTHERN PUERTO
RICO.
PRZ014-281000-
SOUTHEAST COASTAL PLAINS-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 20 40
TEMP (24H TREND) 85 (+1) 64 (-2) 85
RH % (24H TREND) 46 (-5) 87 (-1) 43
WIND 20FT/EARLY(MPH) E 12 NE 9 E 9
WIND 20FT/LATE(MPH) E 12 NE 9 E 9
MIXING HGT(FT-AGL/MSL)5640 5220
TRANSPORT WND (MPH) E 7 E 5
VENT RATE (KT-FT) 33840 20880
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-281000-
SOUTHERN HILLS-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 40
TEMP (24H TREND) 81 (+3) 61 (-4) 80
RH % (24H TREND) 56 (-7) 96 (+4) 55
WIND 20FT/EARLY(MPH) E 9 NE 8 NE 9
WIND 20FT/LATE(MPH) E 9 NE 8 NE 9
MIXING HGT(FT-AGL/MSL)5930 5750
TRANSPORT WND (MPH) E 6 NE 5
VENT RATE (KT-FT) 29650 23000
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-281000-
NORTH COASTAL PLAINS-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 20
TEMP (24H TREND) 83 (+1) 64 (-3) 82
RH % (24H TREND) 58 (-4) 96 (+3) 58
WIND 20FT/EARLY(MPH) NE 11 E 10 N 12
WIND 20FT/LATE(MPH) NE 11 E 10 N 12
MIXING HGT(FT-AGL/MSL)4940 5060
TRANSPORT WND (MPH) E 8 NE 6
VENT RATE (KT-FT) 34580 25300
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-281000-
NORTHERN HILLS-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 10
TEMP (24H TREND) 81 (+1) 62 (-3) 80
RH % (24H TREND) 58 (-5) 96 (+3) 59
WIND 20FT/EARLY(MPH) NE 9 E 8 N 11
WIND 20FT/LATE(MPH) NE 9 E 8 N 11
MIXING HGT(FT-AGL/MSL)6260 5600
TRANSPORT WND (MPH) E 5 NE 6
VENT RATE (KT-FT) 25040 28000
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-281000-
WEST COAST-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR CLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 30 0 0
TEMP (24H TREND) 84 (0) 63 (-3) 84
RH % (24H TREND) 55 (-5) 94 (+3) 55
WIND 20FT/EARLY(MPH) E 9 NE 11 N 13
WIND 20FT/LATE(MPH) E 9 NE 11 N 13
MIXING HGT(FT-AGL/MSL)4980 5020
TRANSPORT WND (MPH) SE 5 NE 6
VENT RATE (KT-FT) 19920 25100
DISPERSION 5 5
DSI 5 3 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-281000-
EASTERN INTERIOR-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 30
TEMP (24H TREND) 81 (+1) 62 (-4) 81
RH % (24H TREND) 59 (-5) 95 (+2) 59
WIND 20FT/EARLY(MPH) E 8 E 8 N 9
WIND 20FT/LATE(MPH) E 8 E 8 N 9
MIXING HGT(FT-AGL/MSL)5590 5950
TRANSPORT WND (MPH) E 6 NE 6
VENT RATE (KT-FT) 27950 29750
DISPERSION 5 5
DSI 5 1 4
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-281000-
LUQUILLO MOUNTAIN RANGE-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 30
TEMP (24H TREND) 78 (+3) 62 (-3) 77
RH % (24H TREND) 63 (-7) 97 (+1) 63
WIND 20FT/EARLY(MPH) E 6 E 5 N 6
WIND 20FT/LATE(MPH) E 6 E 5 N 6
MIXING HGT(FT-AGL/MSL)4560 5440
TRANSPORT WND (MPH) E 7 NE 6
VENT RATE (KT-FT) 27360 27200
DISPERSION 5 5
DSI 5 1 4
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-281000-
CENTRAL MOUNTAIN RANGE-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 30 20
TEMP (24H TREND) 79 (+3) 59 (-4) 79
RH % (24H TREND) 58 (-9) 99 (+4) 59
WIND 20FT/EARLY(MPH) NE 6 E 8 NE 13
WIND 20FT/LATE(MPH) NE 6 E 8 NE 13
MIXING HGT(FT-AGL/MSL)7100 6160
TRANSPORT WND (MPH) NE 2 NE 5
VENT RATE (KT-FT) 14200 24640
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-281000-
CAYEY MOUNTAIN RANGE-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 10 40
TEMP (24H TREND) 77 (+1) 61 (-3) 77
RH % (24H TREND) 64 (-4) 97 (+1) 61
WIND 20FT/EARLY(MPH) E 8 NE 6 NE 8
WIND 20FT/LATE(MPH) E 8 NE 6 NE 8
MIXING HGT(FT-AGL/MSL)4920 5580
TRANSPORT WND (MPH) E 8 NE 7
VENT RATE (KT-FT) 34440 33480
DISPERSION 5 5
DSI 5 1 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-281000-
VIEQUES-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 40
TEMP (24H TREND) 83 (0) 69 (-1) 82
RH % (24H TREND) 55 (-3) 85 (-2) 54
WIND 20FT/EARLY(MPH) E 9 E 8 NE 10
WIND 20FT/LATE(MPH) E 9 E 8 NE 10
MIXING HGT(FT-AGL/MSL)4220 4730
TRANSPORT WND (MPH) NE 12 NE 12
VENT RATE (KT-FT) 42200 47300
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-281000-
CULEBRA-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 30 20
TEMP (24H TREND) 83 (0) 70 (-2) 82
RH % (24H TREND) 55 (-4) 84 (0) 55
WIND 20FT/EARLY(MPH) E 8 E 8 NE 10
WIND 20FT/LATE(MPH) E 8 E 8 NE 10
MIXING HGT(FT-AGL/MSL)4210 5080
TRANSPORT WND (MPH) E 9 NE 6
VENT RATE (KT-FT) 33680 25400
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-281000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 30
TEMP (24H TREND) 85 (+1) 64 (-3) 84
RH % (24H TREND) 45 (-5) 91 (+7) 44
WIND 20FT/EARLY(MPH) E 11 NE 12 SE 14
WIND 20FT/LATE(MPH) E 11 NE 12 SE 14
MIXING HGT(FT-AGL/MSL)5630 5030
TRANSPORT WND (MPH) E 6 E 5
VENT RATE (KT-FT) 28150 20120
DISPERSION 5 5
DSI 5 2 5
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-281000-
SAINT THOMAS AND SAINT JOHN-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 30 30
TEMP (24H TREND) 82 (+1) 69 (-3) 81
RH % (24H TREND) 58 (-3) 84 (+1) 57
WIND 20FT/EARLY(MPH) E 8 E 8 NE 8
WIND 20FT/LATE(MPH) E 8 E 8 NE 8
MIXING HGT(FT-AGL/MSL)4350 5210
TRANSPORT WND (MPH) NE 10 NE 6
VENT RATE (KT-FT) 39150 26050
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-281000-
ST CROIX-
444 AM AST SAT DEC 27 2025
TODAY TONIGHT SUN
CLOUD COVER CLEAR CLEAR MCLEAR
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 40
TEMP (24H TREND) 83 (+1) 70 (-2) 82
RH % (24H TREND) 57 (-4) 82 (0) 57
WIND 20FT/EARLY(MPH) E 9 E 8 NE 9
WIND 20FT/LATE(MPH) E 9 E 8 NE 9
MIXING HGT(FT-AGL/MSL)5250 4780
TRANSPORT WND (MPH) E 10 NE 6
VENT RATE (KT-FT) 47250 23900
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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